Approximation of OLAP queries on data warehouses
We study the approximate answers to OLAP queries on data warehouses. We consider the relative answers to OLAP queries on a schema, as distributions with the L1 distance and approximate the answers without storing the entire data warehouse. We first introduce three specific methods: the uniform sampl...
Main Author: | Cao, Phuong Thao |
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Language: | English |
Published: |
Université Paris Sud - Paris XI
2013
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Subjects: | |
Online Access: | http://tel.archives-ouvertes.fr/tel-00905292 http://tel.archives-ouvertes.fr/docs/00/90/52/92/PDF/VA2_CAO_PHUONG_THAO_20062013.pdf |
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